To determine the level of temperature fluctuations,
and to take into account small-scale properties of the turbulence,
we use two-point correlation functions.
For fully developed turbulence, scalings for
the turbulent correlation time and
the turbulent kinetic energy spectrum
are related via the Kolmogorov scalings [1]}, [2]}, [3]}, [4]}.
We consider fully developed turbulence, where the Strouhal number
is of the order of unity and the turbulent correlation time
is scale-dependent, so we apply the Fourier transformation only in
\({k}\)  space.
